Write a piecewise function describing your weekly pay P, in terms of the number of hours worked, h.
Answers
SOLUTION
the wage for less that 40 hours of work is
[tex]12h[/tex]The wage for more than 40 hours is:
[tex]1.5\times12=18h[/tex]Therefore the piecewise function is
[tex]\begin{cases}12h{,0\lt h\le40} \\ 18h{,h\gt40}\end{cases}[/tex]
Related Questions
what is the range of this exponential function?1) all real numbers 2) { y | y > 0 }3) { y | y ≥ 0 }4) { y | y ≤ 0 }5) { y | y < 0 }
Answers
Remember that
The range is the data set of all possible values of y
In this function
y>0
the range is the interval (0, infinite)
therefore
answer is the second option
Determine the radius of the circle with center at (7,-4) and a point on the circle (-2, 5). Show organized work to support your answer. Round your answer to the nearest tenth.
Answers
The radius of the circle with center at (7,-4) and a point on the circle (-2, 5). is 9√2
Radius is the line segment extending from the center of a circle or sphere to the circumference or bounding surface, it is the distance betwee the center of the circle to a point on the circumference
the circle with center at (7,-4) and a point on the circle (-2, 5).
We can find the radius by using the distance formula
r = √((x₂ - x₁)² + (y₂ - y₁)²)
r = √((-2 -7)² + 5 - (-4)²)
r = √(9² + 9²)
r = 9√2
Therefore, the radius of the circle with center at (7,-4) and a point on the circle (-2, 5). is 9√2
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Graph the equation-6x + 2y = 10 2. Compare and Contrast this graph to the graph from the previous problem. pleas be SPECIFIC:)
Answers
we have the equation
6x + 2y = 10
To graph the line we need at least two points
Find out the first point
For x=0
6(0)+2y=10
2y=10
y=5
The first point is (0,5)
Find out the second point
For x=3
6(3)+2y=10
2y=10-18
2y=-8
y=-4
the second point is (3,-4)
Plot the points and join them to graph the line
using a graphing tool
starting with the graph of f(x)=8^x write the equation of the graph that results from Shifting f(x) 5 units upward y=____shifting f(x) 9 units to the left y=____reflecting f(x) about the x axis and the y axis y=
Answers
We have the following:
[tex]f(x)=8^x[/tex](a)
for there to be an upward displacement, we must add the function the value that we want it to rise, like this
[tex]f(x)=8^x+5[/tex](b)
for there to be a shift to the left, we must add the exponent from the value we want it to rise, like this
[tex]f(x)=8^{x+9}[/tex](c)
for there to be a shift to the left, we must subtract the exponent from the value we want it to rise, like this
The inverse is:
[tex]\begin{gathered} y=8^x \\ x=8^y \\ \ln x=y\cdot\ln 8 \\ y=\frac{\ln x}{\ln 8} \end{gathered}[/tex]The answer is
[tex]f(x)=\frac{\ln x}{\ln 8}[/tex]A population of beetles are growing according to a linear growth model. The initial population (week 0) is Po = 9, and the population after 4 weeks is P4 = 25. Find an explicit formula for the beetle population after n weeks. Pn = After how many weeks will the beetle population reach 113?
Answers
Pn = 4n + 9
it will take 26 weeks
Explanation:Po = 9
P4 = 25
the linear model will be in the form of linear equation:
y = mx + c
where c = Po
x = 4
y = P4 = 25
we insert to get the m = slope or rate of change
25 = m(4) + 9
25 = 4m + 9
25 - 9 = 4m
16 = 4m
m = 16/4
m = 4
Inserting the m and c into the equation of line:
y = 4x + 9
We are told represent the number of weeks with n. Hence, we replace our x with n.
Also, y = Pn
Pn = 4n + 9
when Pn = 113, n = ?
Pn = 4n + 9
113 = 4n + 9
113 - 9 = 4n
104 = 4n
104/4 = n
n = 26
Therefore, it will take 26 weeks for the beetle population to reach 113
Seventh grade > Y.12 Area of compound figures with triangles MRGWhat is the area of this figure?3 mm4 mm8 mm2 mm5 mm6 mm3 mmWrite your answer using decimals, if necessary.square millimeters6 mm
Answers
Area of the figure = 72mm²
Explanation:Given:
An irregular figure
To find:
the area of the figure
To determine the area, we will divide the figure into shapes with known areas
We have 1 triangle, 1 rectangle, and 1 square. We will find the area of each of the shapes
Area of triangle = 1/2 × base × height
height = 3mm
base = 4 + 3 + 1 = 8mm
[tex]\begin{gathered} Area\text{ of the triangle = }\frac{1}{2}\times8\times3 \\ \\ Area\text{ of the traingle = 12 mm}^2 \end{gathered}[/tex]Area of rectangle = length × width
length = 8mm, width = 3mm
[tex]\begin{gathered} Area\text{ of the rectangle = 8 }\times\text{ 3} \\ \\ Area\text{ of the rectangle = 24 mm}^2 \end{gathered}[/tex]Area of square = length²
length = 6 mm
[tex]\begin{gathered} Area\text{ of the square = 6}^2 \\ \\ Area\text{ of the square = 36 mm}^2 \end{gathered}[/tex]Area of the figure = Area of triangle + Area of the rectangle + Area of the square
[tex]\begin{gathered} Area\text{ of the figure = 12 + 24 + 36} \\ \\ Area\text{ of the figure = 72 mm}^2 \end{gathered}[/tex]2. What is the value of 'm' if 9m ÷ 9-3 = 95
Answers
Answer:
m = 98
Step-by-step explanation:
9m/9 - 3 = 95
9m/9 = 95 + 3
9m/9 = 98
cross-multiply
9m = 98 × 9
9m = 882
Divide both sides by 9
m = 98
Use this diagram to answer the questions
4b. 3
Part A
Which expression represents the area of the rectangle?
B. 6+ (40 - 3)
A6(4-3)
D. 2 x 6 x (40 - 3)
C
6+ (40 - 3) + 6 + (40 - 3)
Part B
Which expression is equivalent to the expression you chose in Part A?
B. 246 - 18
A
240-3
D859
C. 80+ 6
Find the area of the rectangle if = 4 Enter your answer in the box
square units
Answers
We will answer the question given in the picture.
We can see from the question a part of a linear function, and we can see an open circle at the point (4, -2). We can also see that the arrow of the linear function indicates that the function continues infinitely.
To find the domain and the range of the function we need to remember that:
• The domain of a function is, roughly speaking, all of the values for which the function is defined. In general, is represented by all of the values of x for which this function is defined.
,• The range of a function is, roughly speaking, all the values that the variable y, the dependent variable, takes for each of the values of the independent variable, x.
Therefore, if we check the graph, we have:
The domain of the function1. The values for x are not defined for x = 4 (we can see a small open circle at the point (4, -2). However, the values for x continue infinitely after that. Therefore, the domain of the part shown is as follows:
[tex]\text{ Domain=}x>4[/tex]And we can say that the domain of the function is for all of the values greater (not equal to x = 4) to positive infinity. We can write this in interval notation as follows:
[tex]\text{ Domain=}(4,\infty)[/tex]The range of the functionWe can check from the graph that the values for y start from y = -2. However, y = -2 is not included since we have a small open circle that indicates that (see above).
Therefore, the range of the function is given by:
[tex]y<-2[/tex]And we can say that the values of the range are less than y = -2 (not equal), and they are all smaller than y = -2 (for instance, -3, -4, -5.001, -10.222, and so on). The latter values are less than y = -2. We can write this in interval notation as follows:
[tex]\text{ Range=}(-2,-\infty)_[/tex]Therefore, in summary, we can say that:
1. The inequality to represent the domain of the part shown is x > 4. It means that the domain is those values of the independent variable greater than x = 4 (not equal to 4), and these values extend to positive infinity.
2. The inequality to represent the range of the part shown is y < -2. It means that the range is those values of the dependent variable less than y = -2 (not equal to y = -2), and these values extend to negative infinity.
v-7/3 = 0...........
Answers
Answer
Explanation
The question to be solved is
can you help me with this question
Answers
Since B is the midpoint of AC, we can conclude:
[tex]\begin{gathered} AC=AB+BC \\ also \\ AB=BC \\ so\colon \\ 6x+1=2x+9 \\ solve_{\text{ }}for_{\text{ }}x\colon \\ 6x-2x=9-1 \\ 4x=8 \\ x=\frac{8}{4} \\ x=2 \end{gathered}[/tex]2 + 2 what is it I need to know please :/
Answers
2+2=4
The answer is 4
Answer:
4!
Step-by-step explanation:
when you add them together you get 4
Are these events independent or dependent? A. Rolling a 6-sided dice twice and recording whether the outcome was even or odd. B. Picking a number from a hat, recording the number and keeping the slip out of the hat, then picking a second number from the same hatA. dependent ; independentB. independent; dependentC. independent ; independentD. dependent ; dependent
Answers
Divide the polynomials using long division or synthetic division.
(x³ − 4x²+x+6) ÷ (x − 2)
(Type your answer in the box WITHOUT any spaces.)
I
A/
Answers
Answer:To divide a polynomial by a binomial of the form x - c using synthetic division.
Use the Remainder Theorem in conjunction with synthetic division to find a functional value.
Use the Factor Theorem in conjunction with synthetic division to find factors and zeros of a polynomial function.
Step-by-step explanation:
if you have the lessons this is what id do to solve this!
I need help with 10 please it says to find the area of each shaded sector. And round to the hundredth place
Answers
Given:
SR = 26 m.
To find:
The area of shaded region.
Solution:
Here, QR ~ PS. So, angle PTS = angle QTR.
So, angle PTS = 73 degrees.
To find the area of the shaded region, we have to subtract the area of unshaded region from the area of the circle.
Here, SR is the diameter and SR = 26. So, the radius of the circle is 13 m.
Since, the unshaded regions are similar to each other. So, the total area of the unshaded region is:
[tex]\begin{gathered} A=2\times\frac{73}{360}\times\frac{22}{7}\times(13)^2 \\ =\frac{542828}{2520} \\ =215.41m^2 \end{gathered}[/tex]The area of the circle is:
[tex]\begin{gathered} A=\pi r^2 \\ =\frac{22}{7}\times(13)^2 \\ =\frac{3718}{7} \\ =531.14 \end{gathered}[/tex]So, the area of shaded region is:
[tex]531.14-215.41=315.73m^2[/tex]Thus, the area of the shaded region is 315.73 m^2.
A survey was done on the drink preferences of shoppers at the mall. The results are shown in the table. What is the probability that a shopper, chosen at random, will prefer neither Drink D nor Drink C?
Answers
SOLUTION:
Case: probability
Method:
From the table,
The probability that a shopper will prefer neither D nor C is:
[tex]\begin{gathered} Pr(NotDorC) \\ =\frac{n(AorBorE)}{Total} \\ =\frac{9+11+5}{46} \\ =\frac{25}{46} \end{gathered}[/tex]Final answer:
The probability that a shopper will prefer neither Drink D nor C:
25/46
-x + 2y = 11 three points graphed please help !
Answers
We can see that we have the following equation:
[tex]-x+2y=11[/tex]And we can see that this is a linear equation in standard form:
[tex]Ax+By=C[/tex]And we need to graph the linear equation. To achieve that, we can proceed as follows:
1. We can find the intercepts of the linear function, and then we will have two points we can use to graph the line equation. We can find another point to graph it easier.
2. To find the x-intercept (the point where the line passes through the x-axis, and when y = 0) is as follows:
[tex]\begin{gathered} -x+2y=11\rightarrow y=0 \\ \\ -x+2(0)=11 \\ \\ -x=11\Rightarrow x=-11 \end{gathered}[/tex]Therefore, the x-intercept is (-11, 0).
3. To find the y-intercept (the point where the line passes through the y-axis, and when x = 0) is as follows:
[tex]\begin{gathered} -x+2y=11\rightarrow x=0 \\ \\ 2y=11 \\ \\ \frac{2y}{2}=\frac{11}{2} \\ \\ y=5.5 \end{gathered}[/tex]Therefore, the y-intercept is 5.5 (0, 5.5).
4. Since we have a decimal, and to be more precise, we can find another point. To do that, we can try with x = 5:
[tex]\begin{gathered} -x+2y=11 \\ \\ -5+2y=11 \\ \\ -5+5+2y=11+5 \\ \\ 2y=16\Rightarrow y=\frac{16}{2}=8 \\ \\ y=8 \\ \end{gathered}[/tex]Then we have another pair to graph the function: (5, 8).
5. We can find another point, using x = -5. Then we have:
[tex]\begin{gathered} -x+2y=11 \\ \\ -(-5)+2y=11 \\ \\ 5+2y=11\Rightarrow5-5+2y=11-5 \\ \\ 2y=6 \\ \\ \frac{2y}{2}=\frac{6}{2}\Rightarrow y=3 \end{gathered}[/tex]Therefore, another point is (-5, 3)
5. Now, with these values, we can sketch the graph of the line as follows (we will use (-5, 3) and (5, 8), and we will see that the line passes through the point (0, 5.5):
• (-11, 0),, (-5, 3),, (0, 5.5), ,(5, 8)
Therefore, we can see the points: (-5, 3), (0, 5.5), and (5, 8) are three points that solve the equation -x + 2y = 11, since they lie on that line:
[tex]\begin{gathered} -(-5)+2(3)=11 \\ \\ 5+6=11 \\ \\ 11=11\text{ \lparen It is true\rparen} \\ \\ \text{ And we can follow the same steps for the other two points:} \\ \\ -(0)+2(5.5)=11 \\ \\ 11=11 \\ \\ \text{ And} \\ \\ -5+2(8)=11 \\ \\ -5+16=11 \\ \\ 11=11 \end{gathered}[/tex]Therefore, in summary, we graphed the linear function as follows, and we found that the three points on the graph solve the equation -x + 2y = 11, that is, (-5, 3), (0, 5.5), and (5, 8):
1. Select all values of x that are solutions to the equation: -2(x + 4)(3x - 18) = 0A) -6B) -4C) -2D) OE) 2F) 4G) 6
Answers
x = -4 OR x = 6
The correct options are B and G
Donna run 7 miles in 60 minutes. At the same rate, how many miles would she run in 24 minutes?
Answers
We know how many miles she runs in 60 mins, we can make a rule of three to find the miles in 24 mins
So if she runs 7 miles in 60 mins
how many x miles in 24mins
x = (24mins*7miles)/60mins = (24*7miles)/60 = 2.8 miles
So, Donna runs 2.8 miles in 24mins.
QuestionThe population of deer in a national forest has consistently increased by 5% each year. This year, thepopulation of deer is 5, 000. If the population increases at the same rate, what number of deer isexpected to be in the national forest next year?
Answers
Answer:
5250 deer
Explanation:
We know that the deer population increases by 5% each year. This means That if we start with a population of 5000, then next year the population will be 100% + 5% = 105% of 5000.
Now, what is 105% of 5000?
The answer is
[tex]5000\times\frac{105\%}{100\%}[/tex][tex]=5250[/tex]Hence, the deer population after one year will be 5250.
We can solve the same problem with a somewhat different approach.
We know that the deer population increases by 5% per year. Then what is the deer population next year if we start with 5000 deer?
Next year the population will have increased by 5%.
Now, what is 5% of 5000?
The answer is
[tex]5000\times\frac{5\%}{100\%}[/tex][tex]=250[/tex]This means the population has increased by 250.
Therefore, the population next year is 5000 + 250 = 5250 deer.
A large survey of countries including the USA, China, Russia, France, and others indicated that most people prefer the color blue. In fact, about 24% of the population claim blue as their favorite color. Suppose a random sample of 86 college students were surveyed and 30 of them said that blue is their favorite color. Does this information imply that the color preference of all college students is different (either way) from that of the general population? Use α = 0.05.1. State your null and alternate hypothesis. What is the level of significance? Will you use a left tail, right tail or two-tail test?2. What is the value of the test statistic. 3.lFind the P-value. Sketch the sampling distribution z = to show the area corresponding to the P-value. 4. Based on 1-3, will you reject or fail to reject the null hypothesis? Are the data statistically significant at level α ? State your conclusion in the context of the application.
Answers
We have to perform an hypothesis test of a proportion.
The claim is that the sample has a different proportion than the population.
Then, the null and alternative hypothesis are:
[tex]\begin{gathered} H_0\colon\pi=0.24 \\ H_a\colon\pi\neq0.24 \end{gathered}[/tex]The significance level is 0.05.
The sample has a size n=86.
The sample proportion is p=0.349.
[tex]p=X/n=30/86=0.349[/tex]The standard error of the proportion is:
[tex]\begin{gathered} \sigma_p=\sqrt{\dfrac{\pi(1-\pi)}{n}}=\sqrt[]{\dfrac{0.24\cdot0.76}{86}} \\ \sigma_p=\sqrt{0.002121}=0.046 \end{gathered}[/tex]Then, we can calculate the z-statistic as:
[tex]z=\dfrac{p-\pi-0.5/n}{\sigma_p}=\dfrac{0.349-0.24-0.5/86}{0.046}=\dfrac{0.103}{0.046}=2.241[/tex]This test is a two-tailed test*, so the P-value for this test is calculated as:
[tex]\text{P-value}=2\cdot P(z>2.241)=0.025[/tex]* We use a two-tailed test because we are looking for difference above or below the population proportion.
As the P-value (0.025) is smaller than the significance level (0.05), the effect is significant.
The null hypothesis is rejected.
At a significance level of 0.05, there is enough evidence to support the claim that the sample has a different proportion than the population.
Answer:
1) The null and alternative hypothesis are:
[tex]\begin{gathered} H_0\colon\pi=0.24 \\ H_a\colon\pi\neq0.24 \end{gathered}[/tex]2) The test statistic is z=2.241.
3) The P-value is 0.025. The value in the standard normal distribution is:
4) As the effect is significant (the P-value is less than the significance level), there is evidence to reject the null hypothesis.
The conclusion is that this sample has a proportion that is significantly different from that from the population.
Mark says that an angle showing a turn through of a circle that is 10 inches across
Answers
The question involves comparing the measure of two angles different circles
For the first circle
The angle turn through 1/4 of a circle, which means that the circle turns through 90 degrees
For the second circle that is 10 inches across
The angle also turned through 1/4 of the circle. This also implies that the circle turns through 90 degrees
Thus,
The angle turned by the two circles is the same. Hence, Mark is not correct
Find the diameter of the circle with an area of 14π squared inches. Round to the nearest hundredths. Please solve using this formula: Area= πr^2r=radius
Answers
Given:
Area of the circle
[tex]A=14\pi\text{ in.}^2[/tex]Required:
To find the diameter of the circle.
Explanation:
The area of the circle is given by the formula:
[tex]A=\pi r^2[/tex]Where r = radius of the circle
Put the given value of A.
[tex]\begin{gathered} 14\pi=\pi r^2 \\ r^2=14 \end{gathered}[/tex]Take the square root on both sides.
[tex]\begin{gathered} r=\sqrt{14} \\ r=3.741\text{ in.} \end{gathered}[/tex]Now the diameter D= 2r
[tex]\begin{gathered} D=2\text{ }\times3.741 \\ D=7.482\text{ in.} \end{gathered}[/tex]Final answer:
The diameter of the circle D= 7.482 in,
what is represented by 2 in the ordered pair (2,7)
Answers
In (2, 7), 2 is the input
What are the coefficients in the expression 32x + 24y - 15z?
Answers
Answer:
32, 24, 15
Step-by-step explanation:
A coefficient is a number that comes before a variable, so therefor 32 24 and 15 are the coefficients.
What is the product of 2 1/2 and 1 1/4
Answers
First, we transform the mixed fractions into improper fractions:
[tex]\begin{gathered} 2\frac{1}{2}=\frac{2\cdot2+1}{2}=\frac{5}{2}, \\ 1\frac{1}{4}=\frac{1\cdot4+1}{4}=\frac{5}{4}. \end{gathered}[/tex]Then, we multiply the improper fractions:
[tex]\frac{5}{2}\cdot\frac{5}{4}=\frac{5\cdot5}{2\cdot4}=\frac{25}{8}\text{.}[/tex]Finally, we transform the improper fraction into a mixed fraction:
[tex]\frac{25}{8}=\frac{24+1}{8}=\frac{3\cdot8+1}{8}=3\frac{1}{8}\text{.}[/tex]Answer:
[tex]3\frac{1}{8}\text{.}[/tex]2 3/5 •3= ?A 13/15B 1 2/13C 6 3/5D 7 4/5
Answers
Given:
[tex]2\frac{3}{5}\times3=?[/tex]First of all,we multiply 5 and 2 i.e.
[tex]\begin{gathered} 5\times2=10 \\ \end{gathered}[/tex]Then,add 3 to this value.
It becomes 10+3=13
Hence,
[tex]2\frac{3}{5}\times3=\frac{13}{5}\times3[/tex][tex]=\frac{39}{5}[/tex]Now, we convert the obtained value in mixed fraction.
First we divide 39 by 5 and then write the remainder in numerator and dividend in the side as shown.
[tex]\frac{39}{5}=7\frac{4}{5}[/tex]Here, when we divide we get 6 as divident and 4 as remainder, so we express it like this.
Hence, option (4) is correct.
Having trouble understanding
Answers
Since the value of the coin collection rises proportionally every year, this functions exponentially.
What are exponential functions?The exponential function in mathematics is represented by the symbols f(x)=exp or ex. The word, unless otherwise stated, normally refers to the positive-valued function of a real variable, though it can be extended to the complex numbers or adapted to other mathematical objects like matrices or Lie algebras. f(x) = bx, where b > 0 and b 1, is the formula for an exponential function. B is referred to as the base and x is referred to as the exponent, just like in any exponential expression. Bacterial proliferation is an illustration of an exponential function. Some bacteria grow by two folds per hour. The exponent is the independent variable, or x-value, in an exponential function, while the base is a fixed value. An exponential function would be, for instance, y = 2x. Here is what that appears to be.
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which equation represents the graph shown below?A. y=4sin(pi/80x)+5B. y=5cos(pi/80x)+4C. y=4cos(pi/80x)+5D. y=5sin(pi/80x)+4
Answers
Since the amplitud of the function is 5 and it starts on (0,9) we can say that the function is:
y=5cos(pi/80x)+4
What makes 3 + 7 + 2 = 0 + 2 true?
Answers
Assuming that the question for this case is:
[tex]3+7+2=x+0+2[/tex]We can subtract in both sides of the equation 2 and we got:
[tex]x=3+7+2-2=10[/tex]And the solution for this case would be 10
You deposit $300 in an account that pays 1.48% annual interest. What is the balance after 1 year if the interest is compound daily?
Answers
We are going to use the compound interest formula to solve:
[tex]A=P(1+\frac{r}{n})^{nt}[/tex]Where:
P = initial balance
r = interest rate
n = number of times compounded annually
t = time
1.48% to a decimal
[tex]\frac{1.48}{100}=0.0148[/tex]Since the interest is compounded daily, we will use 365 for n. Therefore:
[tex]A=300(1+\frac{0.0148}{365})^{365(1)}=300(1+\frac{0.0148}{365})^{365}=304.47[/tex]Answer: $304.47